The separator must possess the corresponding "recognition" capabilities for grading powders with different properties, as only then can it meet the production requirements of the system. The evolution of separators has gone through a long development process, from the first-generation centrifugal separator to the second-generation cyclone separator, and finally to the widely used separators today.

In comparison, the selection classifier, represented by the classifier, boasts superior comprehensive performance and has been widely promoted. The classifier utilizes a cage-type grading mechanism, applying the principle of cylindrical vortex airflow grading. The cage rotor, composed of vertical blades, maintains a consistent pressure difference throughout the selection area during rotation, forming a relatively stable and uniform cylindrical vortex flow field. This creates favorable conditions for accurate product grading, with high grading precision.

Many manufacturers are now using conventional separator mills directly in fine slag powder grinding systems, which is inappropriate. This is because conventional separator mills, both in structural design and in the selection of process parameters, are designed according to the requirements of cement production and are not suitable for direct use in the production of slag micro-powders. As slag micro-powder particles are finer and less dense than cement product particles, it should have distinct differences in the feeding and classification characteristics of the separator mill.

The principle and effect of cutting particle size formed by the inertial centrifugal force of the vortex field and the viscous force of the airflow in the classification process of the existing separator when directly used for the production of slag micro-powder are quite different, which makes it challenging to meet the requirements for finished product particle size and classification in the slag micro-powder. As a result, it's difficult to select out finished products with a high specific surface area from the slag powder.

The current fine selection powder machines mainly enhance the specific surface area of the finished product by increasing the rotational speed of the main shaft of the separator. However, this method has limited effectiveness in boosting the specific surface area, and as the rotational speed of the separator's main shaft is significantly increased, the power consumption of the separator also rises dramatically.